\begin{tabular}{l*{6}{c}}
\hline\hline
                    &Principled opposition&            &            &Political ideology&            &            \\
                    &\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}&\multicolumn{1}{c}{(3)}&\multicolumn{1}{c}{(4)}&\multicolumn{1}{c}{(5)}&\multicolumn{1}{c}{(6)}\\
                    &\multicolumn{1}{c}{Unsure in reply}&\multicolumn{1}{c}{Easy to decide}&\multicolumn{1}{c}{Table missed info}&\multicolumn{1}{c}{Unsure in reply}&\multicolumn{1}{c}{Easy to decide}&\multicolumn{1}{c}{Table missed info}\\
\hline
Block randomization=1&     -0.0368&      0.0362&     -0.0836&     -0.0569&     -0.0780&     -0.0502\\
                    &     (0.470)&     (0.458)&     (0.079)&     (0.453)&     (0.261)&     (0.473)\\
[1em]
Rejectors=1         &       0.270&      -0.581&      -0.126&            &            &            \\
                    &     (0.003)&     (0.000)&     (0.132)&            &            &            \\
[1em]
Block randomization=1 $\times$ Rejectors=1&    -0.00522&      -0.103&      0.0608&            &            &            \\
                    &     (0.964)&     (0.318)&     (0.564)&            &            &            \\
[1em]
Ideology: center    &            &            &            &      0.0214&      0.0626&      0.0222\\
                    &            &            &            &     (0.808)&     (0.449)&     (0.785)\\
[1em]
Ideology: right     &            &            &            &      -0.187&       0.382&       0.183\\
                    &            &            &            &     (0.044)&     (0.000)&     (0.031)\\
[1em]
Block randomization=1 $\times$ Ideology: center&            &            &            &      0.0691&       0.108&      0.0255\\
                    &            &            &            &     (0.528)&     (0.294)&     (0.802)\\
[1em]
Block randomization=1 $\times$ Ideology: right&            &            &            &     -0.0146&       0.188&     -0.0972\\
                    &            &            &            &     (0.899)&     (0.081)&     (0.359)\\
[1em]
Constant            &       3.919&       3.487&       4.035&       4.033&       3.209&       3.945\\
                    &     (0.000)&     (0.000)&     (0.000)&     (0.000)&     (0.000)&     (0.000)\\
\hline
Observations        &        6617&        6617&        6617&        6617&        6617&        6617\\
\hline\hline
\end{tabular}
